PRIMING PISTON DEVICE AND RECIPROCATING LIQUID PUMP

摘要

PROBLEM TO BE SOLVED: To improve pumping efficiency of a reciprocating liquid pump for pumping, particularly a high viscosity material. SOLUTION: A reciprocating liquid pump has a priming cylinder attached to the lower part of an intake valve housing and a priming piston rod 24 attached to a lower end of a piston valve assembly. A priming piston 26 and a priming valve 27 are attached to the lower end of the priming piston rod 24. The priming piston 26 can slide along the priming piston rod 24, and the priming valve 27 has a conical valve surface and can be made to engage with a valve seat in an opening at the center of the priming piston 26.